Network/3G coverage

I called telkom customer care on 7th February 2018 to tell them about the network problem where I stay. I have to roam to other networks to get connected and the lady said they’ll get back to me within 72 hours, and they didn’t. I called again 13th February at 18:00 and the lady by the name of Pulane told me to wait 21 days, then I asked for the supervisor and she said supervisor is on another call and will get back to me before 22:00, she even refused to give me the name of the supervisor on duty. Now it 23:00 they haven’t called back. Why lie to customers? This lack of coverage means I lose out on night suffer, why must I loose out when they can provide proper network?